Sealing cracks and crevices and small openings in buildings is an example of which type of mechanical control method?

• A. Exclusion
• B. Trapping
• C. Biological control
• D. Baiting

Answer: (A)

Sealing cracks and crevices is an exclusion technique, a mechanical control that blocks pests from entering or moving through a structure. By closing gaps with sealants, weatherstripping, screens, and door sweeps, you create a physical barrier that reduces infestations and lessens the need for pesticides. Trapping targets pests after they’re inside, biological control uses natural enemies or pathogens, and baiting attracts pests to a poison or lure—none of these prevent entry the way sealing does.